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Lund Performance Solutions


SOS Global I/O Detail

The Global I/O Detail Screen

The Global I/O Detail screen displays information about local and remote I/Os from a system- wide perspective.




Figure 15.1 SOS Global I/O Detail screen
To access the Global I/O Detail screen from any SOS display screen:
  • Type s from the SOS Enter command: prompt to view the Screen Selection Menu screen.
  • From the Screen Selection Menu screen, enter i (Global I/O Detail). The Global I/O Detail screen will display (refer to Figure 15.1).
  • Global I/O Detail Screen Display Items

    GLOBAL I/O SUMMARY

    The data items in the Global I/O Detail screen are described in the following table.
    Table 15.1
    Data Item
    Description
    Local
    Logical
    Reads
    Total number of logical disk reads on the system (see "logical I/O").
    Writes
    Total number of logical disk writes.
    Read/s
    Logical reads per second.
    Write/s
    Logical writes per second.
    Avg Read Size
    Average size of logical reads in kilobytes (kb).
    Avg Write Size
    Average size of logical writes (kb).
    Local
    Physical
    Reads
    Total number of physical disk reads on the system (see "physical I/O").
    Writes
    Total number of physical writes on the system.
    Read/s
    Physical reads per second.
    Write/s
    Physical writes per second.
    Avg Read Size
    Average size of physical reads (kb).
    Avg Write Size
    Average size of physical writes (kb).
    Local
    User FS
    Reads
    Total number of user reads on the system (see "user I/O").
    Writes
    Total number of user writes on the system.
    Read/s
    User reads per second.
    Write/s
    User writes per second.
    Avg Read Size
    Average size of user reads (kb).
    Avg Write Size
    Average size of user writes (kb).
    Local
    Sys FS
    Reads
    Total number of system reads on the system (see "system I/O").
    Writes
    Total number of system writes on the system.
    Read/s
    System reads per second.
    Write/s
    System writes per second.
    Avg Read Size
    Average size of system reads (kb).
    Avg Write Size
    Average size of system writes (kb).
    Local
    Virt Mem
    Reads
    Total number of virtual memory reads on the system (see "virtual memory I/O").
    Writes
    Total number of virtual memory writes on the system.
    Read/s
    Virtual memory reads per second.
    Write/s
    Virtual memory writes per second.
    Avg Read Size
    Average size of virtual memory reads (kb).
    Avg Write Size
    Average size of virtual memory writes (kb).
    Local
    Raw
    Reads
    Total number of raw memory reads on the system (see "raw I/O").
    Writes
    Total number of raw memory writes on the system.
    Read/s
    Raw memory reads per second.
    Write/s
    Raw memory writes per second.
    Avg Read Size
    Average size of raw memory reads (kb).
    Avg Write Size
    Average size of raw memory writes (kb).
    Remote
    Logical
    Reads
    All NFS I/Os satisfied in a local buffer.
    Writes
    Read/s
    Write/s
    Avg Read Size
    Avg Write Size
    Remote
    Physical
    Reads
    All NFS I/Os that cannot be serviced. locally
    Writes
    Read/s
    Write/s
    Avg Read Size
    Avg Write Size
    SOS GLOBAL I/O SUMMARY data items

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